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Sun, 09 Jul 2000 00:00:00 +0200Sun, 09 Jul 2000 00:00:00 +0200On the Efficiency of Simulation Methods for the Boltzmann Equation on Parallel Computers
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/697
The paper presents a parallelization technique for the finite pointset method, a numerical method for rarefied gas flows.; First we give a short introduction to the Boltzmann equation, which describes the behaviour of rarefied gas flows. The basic ideas of the finite pointset method are presented and a strategy to parallelize the algorithm will be explained. It is shown that a static processor partition leads to an insufficient load-balance of the processors. Therefore an optimized parallelization technique based on an adaptive processor partition will be introduced, which improves the efficiency of the simulation code over the whole region of interesting flow situation. Finally we present a comparison of the CPU-times between a parallel computer and a vector computer.Jens Struckmeier; Franz-Josef Pfreundtpreprinthttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/697Sun, 09 Jul 2000 00:00:00 +0200Adaptive Load Balance Techniques in Parallel Rarefied Gas Simulations
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/601
The paper presents some adaptive load balance techniques for the simulation of rarefied gas flows on parallel computers. It is shown that a static load balance is insufficient to obtain a scalable parallel efficiency. Hence, two adaptive techniques are investigated which are based on simple algorithms. Numerical results show that using heuristic techniques one can achieve a sufficiently high efficiency over a wide range of different hardware platforms.S. Antonov; Franz-Josef Pfreundt; Jens Struckmeierpreprinthttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/601Mon, 03 Apr 2000 00:00:00 +0200